Sanity's Brief Return
"Unnieee—. Hang in thereee—. Fighhtiiing—!!"
"Hahaha!! Good! Keep shaking even more vulgarly like that. It's for your precious unnie, right? You have to give it your all."
"Yesssh—."
She did her best to lift the spirits of her unnie, who had been struggling lately, just as he said.
Sweat poured down her entire body, her upturned eyes ached, and the muscles around her mouth felt tight, but she endured it all.
If watching a video of her shaking her naked body with all her might could give her unnie even the slightest bit of strength, then any discomfort was trivial.
Several minutes passed like that while she filmed the video for her unnie.
When her tiptoeing legs began to tremble and her physical limits pressed in, she had no choice but to speak.
"Heuk, hek… O-oppa, can I rest for just a little bit?"
"Sure. I was starting to get bored anyway."
He spoke with a smirk.
……??
Bored?
…Better not think too deeply.
Oppa is someone to be grateful for.
Having strange thoughts about such a person would be incredibly rude.
Yes, that's right.
Rude.
"Before that, shall we take a commemorative photo?"
"A commemorative… photo?"
She tilted her head at the unexpected suggestion.
"Yeah, I'll take it along with the video. Here, look this way and make a V sign."
"V… V sign…?"
When he suddenly raised his phone, she hastily lifted her hand.
Even as she did it, she couldn't understand why she was behaving this way.
A commemorative photo?
Was it really necessary to take one while filming a video for unnie?
Or maybe not?
When she thought about it, it sounded reasonable…?
…No. If oppa says it, she must obey without question.
Yes, that was correct.
Because that was common sense.
"Okay, smile. Taking it now."
"V, V—."

Click.
The sound of the shutter rang out as she held the awkward pose with a strained smile, capturing both the video and the photo.
A strange shame washed over her at the thought that her naked body and this situation were now recorded in a form that would never disappear for the rest of her life.
"Hehe… I wonder what kind of face she'll make when the brainwashing is lifted later and she sees this? I'm curious about your unnie's expression too."
"……?? Brainwashing?"
"Ah, there's something like that. Well then, now for the main event—."
Ring ring!
Just as he was fidgeting and starting to pull down his pants for some reason, a sudden ringtone echoed through the room.
On the glowing screen of his phone that lit up the darkness, the caller ID Second Slave Doll appeared.
"What is it?"
Frowning slightly, he answered the phone and left the room.
Suddenly left alone, she had no idea what to do and could only sit blankly on the bed.
'Come to think of it… where is this place?'
She looked around with a dazed gaze.
It seemed to be his house, and if she had come here on her own two feet, she ought to remember at least roughly where it was.
But no matter how hard she tried to recall, nothing came to mind.
Even thinking that far brought no sense of unease.
Yet the moment she turned her eyes to scan the room again, her thoughts changed completely upon seeing her reflection in the mirror.
There she was—sitting naked on the bed with unfocused eyes, staring blankly.
It was unmistakably her own form reflected in the mirror, one of a kind in this world, yet it felt like a stranger.
'This… is me?'
She reached up and touched her face.
The vivid sensation confirmed it.
This was no dream.
If it wasn't a dream, it was reality—yet it felt as unreal as a dream.
…….
……….…
This is strange.
This isn't right….
This kind of thing… is wrong.
It's not common sense.
Throb.
As doubts rose in her mind, her throbbing headache tried to push them away.
"Ugh…."
She clutched her head against the wave of pain.
Don't think. Stop thinking. Forget all the annoying and irritating things. Obey his words absolutely. Follow his words. His words alone are the most justified and correct thing in this world.
"Uuuu!!"
The pain in her head intensified along with the throbbing, growing stronger.
No human wanted to suffer.
That natural thought urged her to submit to the voice in her head, and a languid numbness spread through her like loosening screws, clouding her mind once more.
As the doubts faded, an equally pleasant sensation rose in their place.
A buoyant happiness surged as if to praise her for the behavior.
'Yes… useless thoughts—.'
Just as she was about to yield to the temptation, the face of her precious person floated into her mind.
Her one and only unnie, Lee Ji-ah.
The most precious existence in the world, one she would trade her life for.
"Un… nie."
The moment she thought of her, the voice interfering with her thoughts receded like a lie, and her blurred consciousness returned.
It felt as if her soul had left her body and then snapped back into place. The restored sense of reality brought natural questions about her current situation, resurfacing memories she had forgotten.
"——Ah."
Ever since meeting Seung-woo oppa… no, from some point after encountering him, everything had gone wrong.
Her memories had become distorted and her sense of common sense had reversed.
The proof was the absurd act she had just committed—filming a video for her unnie while naked and striking bizarre poses.
'Why on earth…?'
Then why was he making her do these things?
To toy with her sexually?
Or did he have some other purpose?
'Come to think of it… wasn't it after she met that oppa that things went bad between unnie and Ha-rin unnie? …Yes, that's right…! Then could it be… that Ha-rin unnie is also being controlled by that oppa just like me? Then… the reason Ha-rin unnie started hating unnie was…? Then why…? Why did he make her act that way toward unnie? Could it be… he's targeting unnie? Then everything he's doing to me now… is because of unnie…?'
Her body began to shake.
She barely managed to cover her mouth with her hand to stop the scream from escaping.
The more she thought, the more terrifying ideas flooded in, crashing over her as pure terror.
Only now did she understand the word brainwashing he had casually mentioned earlier.
She couldn't comprehend how he made it possible, but this was not the time to ponder it deeply.
'I have to tell unnie about this right away! I have to escape—.'
"Kkut!?"
Strength suddenly drained from her body and she pitched forward.
'M-my body won't move….'
Her limbs, collapsed on the bed, trembled as if paralyzed. No matter how hard she tried, she couldn't summon any strength.
Panic and fear surged from the inexplicable phenomenon, but she fought desperately to move.
"Ugg…."
She crawled across the bed like a turtle, inch by inch, but her progress was agonizingly slow.
It was too late.
Escaping under her own power was impossible.
'No… At the very least… I have to let unnie know about this…!'
Her phone sat on the shelf beside the bed.
Even amid the rising despair, this was why she kept wriggling her body without giving up.
Even if escape was impossible, she had to inform unnie at the very least.
Even if it cost her life, it didn't matter.

"Unnieee… please… pleeease—."
Tears streamed down her face.
With single-minded devotion to her unnie, she squeezed out every last ounce of strength and willpower she didn't possess.
She barely lifted her hand toward the phone.
The hand felt as heavy as a lead weight. Though it was clearly part of her own body, it refused to obey, turning every motion into torment.
Even so.
Despite that.
'Please… reach it…!'
Driven by desperate love for one person, her trembling hand stretched forward slowly.
The movement was so sluggish it seemed like slow motion, yet it still crept ahead little by little.
'Pleeease….'
Grab.
"……!!"
She made it.
The familiar texture of the phone against her palm.
Infinite joy flooded her at such a simple sensation.
'Now, call—.'
While she struggled to move her fingertips one joint at a time, tapping the screen with great effort—.
"Ha, would you look at this?"
A voice that sent chills down her spine rang out.
"Looks like something interesting is happening."
She forced her unwilling gaze toward the direction of the voice.
There he stood in the darkness, staring down at her.
His sly smile was filled with malicious curiosity as he watched her.
He looked like a child who had discovered an amusing new toy, eyes sparkling—but he was no child, and his way of thinking was far crueler than any child's.
* *
'Is the stamp broken again? One of these events is enough.'
Lee Ji-seo, Ji-ah's younger sister, stared at him with terror-filled eyes while clutching the phone in her trembling hands.
From the look of it, the moment the brainwashing broke she had tried to call someone.
But just like with Se-ah noona, the safety mechanism that triggered upon release had prevented her from doing so smoothly.
> This isn't a malfunction. Occasionally, if a human's mental strength is exceptionally strong or triggered by a major event, the brainwashing can break. Your Brainwashing Stamp is only the intern version, so its influence is weak. Either way, it's a very rare case… I never expected to witness it in the field.
'…I'm hearing hallucinations again.'
He had been thoroughly ignoring the Guide ever since the incident a few days ago.
Even if he tried to ignore it, the entity was inside his body, so it was nearly impossible, but he had done his best to pretend it didn't exist.
> Seung-woo~ Cheer up. Hmm? I'm sorry, okay~.
Rarely, the Guide apologized in a nasal, cutesy tone.
He had lost count of how many apologies there had been, but he still hadn't accepted any of them.
The events of that day had been far too dangerous for him.
Of course, he had been the one to provoke it, but having his entire life ruined over something so minor was too steep a price.
"O-oppa… Ah, no, um…! Please don't do this… I don't know what your purpose is, but… you can't do something like this…! This is wrong…!!"
The younger sister raised her voice, sobbing as she pleaded.
Her words were correct and justified.
Any ordinary person would have felt a pang of conscience hearing them.
If it had been him from not long ago, he certainly would have.
But not anymore.
He no longer denied that he was enjoying this, and he had no intention of rationalizing it, but the root reason—to repay the debt—remained unchanged.
Two billion won.
He would do anything to pay off that colossal debt.
"Please… I don't know why you're doing this, but… I'm begging you… Please stop… If unnie did something wrong… I'll apologize in her place! So please… At least toward unnie… Please don't do this…!"
"You thought that far? Impressive."
It couldn't have been more than a few minutes since the brainwashing had broken.
In that short time, deducing that he was targeting her unnie was remarkable.
"How admirable… Such tear-jerking sisterly love… It makes me wish I had a younger sister like you…."
He stepped closer and stroked her hair.
Her moist eyes shook violently as she stared at him smiling gently and offering praise.
Those seemingly profound eyes possessed insight as deep as their gaze.
"Are you… planning to turn me into Ha-rin unnie too…? To make me hate unnie… to make me loathe her…?"
He simply smiled at the younger sister without answering.
For her, that was answer enough.
Jet-black despair gradually spread across her widening eyes.
Her lips parted in a soft "Ah," beginning to tremble noticeably.
"Please!! Please don't do that!! Kill me instead! I hate that—!! To hate unnie…! That's something that can never happen to me!! So please, at least don't do that!! Please—!!!"
Her tear-filled cry tore through the room in a voice that seemed ready to shatter.
Her affection for her unnie.
The noble love for which she would sacrifice even her own life.
Sublime humanity.
Heart-wrenching, profound sisterly love.
His remaining hypocritical conscience wavered.
Yet at the same time….
> Ahaha—. It turns you on, doesn't it?
He ignored it again, but unfortunately he could not deny those words.
"Sorry."
"—Ah."
When he apologized in a small, lifeless voice, the younger sister let out a sigh as if she had been struck.
But she quickly regained her senses and struggled to lift her barely responsive hand, begging desperately.
"Please please please don't do tha—."
* *
"Chuuuup—. Chup—. Chuuuuuuup—."
"Hoo…."
The younger sister was quite intelligent as well.
After he taught her how to perform fellatio, she learned quickly and was now lewdly sucking his cock from beneath him.
Looking down at the sight while gripping her shoulders, he felt a strong sense of immorality.
"Haha… Who would have thought the girl who had been begging and crying like a baby would end up like this…."
Her eyes, which had briefly regained their will, now turned vacant. The sight of the doll blindly obeying his every command gave him a thrilling rush of pleasure no matter how many times he witnessed it.
